2 at work. At home, I once had 4. It was awesome for when I was video editing while streaming downloads and sending emails off to people I was working with. But the average person would never need more than 2.

2x24" here and 3x24" at home for Eyefinity setup. Just got done converting a few more users over to dual monitor setups and the jealousy from single monitor users is thick... Luckily I get to use the "ask your manager/boss/supervisor. I don't make decisions on who gets what, I just install" line. It's amazing how petty some people can be...

It sounds like I'm the runt of the bunch... I have 2 22" at 1680 x 1050. At home I have a 24" and a 22". At work I could totally see myself using 3 but I'll wait for the opportune time to spring that one.

I have an old Asus 17" and a 24" WS from Packard Bell. Optimally I would replace both with identical 24" WS's that would support a higher resolution then 1920*1440 and with a higher refreshrate then 60 :(, but at the same time without bankrupting my wallet.

Right now at work I'm using 1-1920x1080 24 in then 2 of the same at home. i have been debating on getting another for here at work and putting it in portrait mode for reading spread sheets and the like.